CN213565847U - Working vehicle - Google Patents
Working vehicle Download PDFInfo
- Publication number
- CN213565847U CN213565847U CN202022338397.9U CN202022338397U CN213565847U CN 213565847 U CN213565847 U CN 213565847U CN 202022338397 U CN202022338397 U CN 202022338397U CN 213565847 U CN213565847 U CN 213565847U
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- Prior art keywords
- brake pedal
- wire
- outer wire
- rear direction
- fixed
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Abstract
The present invention is intended to reduce the possibility of damage to the operating wire connecting the brake pedal and the brake mechanism. The utility model discloses an operation car has: a brake mechanism (3) provided to the drive mechanism (2); a brake pedal (6) for actuating the brake mechanism (3); and an operation wire (34) that connects the brake pedal (6) and the brake mechanism (3), wherein the operation wire (34) has an outer wire (34A) and an inner wire (34B) that is slidably inserted into the outer wire (34A) and can be pushed and pulled, wherein the end of the inner wire (34B) on the brake pedal (6) side is fixed to the body fixing section (35) in a state in which the end is pulled out from the outer wire (34A), and the end of the outer wire (34A) on the brake pedal (6) side is fixed to the brake pedal (6) in a state in which the end is not relatively rotatable.
Description
Technical Field
The utility model relates to an operation car, this operation car have travel with drive mechanism, set up in travel with drive mechanism's arrestment mechanism and make the brake pedal of arrestment mechanism action.
Background
In the work vehicle having the above-described configuration, the brake pedal and the brake mechanism are coupled via the operation wire, and when the brake pedal is depressed, the brake mechanism is pulled by the operation wire to exert a braking action. The operation wire has an outer wire and an inner wire slidably inserted into the outer wire, and is capable of push-pull operation.
The end of the inner wire on the brake pedal side is fixed to the body fixing portion in a state of being pulled out from the outer wire. The end of the outer wire on the brake pedal side is connected to a rotatable holding member that is supported by the brake pedal so as to be rotatable about a horizontal axis. According to this configuration, the holding member is freely rotated with respect to the swing motion caused by the stepping operation of the brake pedal, and the posture of the end portion on the brake pedal side of the outer wire is changed.
However, in the above-described conventional structure, the outer line changes its posture so as to pass through the shortest pull-out path in accordance with the stepping operation. On the other hand, the inner wire is fixed at the end on the brake pedal side, and therefore assumes a posture different from that of the outer wire. As a result, the inner wire may contact the holding member with a strong force due to a relative posture change in the radial direction between the inner wire and the outer wire, and the holding member may be damaged by abrasion.
SUMMERY OF THE UTILITY MODEL
(problem to be solved by the utility model)
Here, it is desirable to reduce the possibility of damage to the operating wire connecting the brake pedal and the brake mechanism.
(means for solving the problems)
The utility model discloses an operation car's characterized in that has: a transmission mechanism for running; a brake mechanism provided to the drive transmission mechanism; a brake pedal for actuating the brake mechanism; and an operating wire that connects the brake pedal and the brake mechanism, the operating wire having an outer wire and an inner wire slidably inserted into the outer wire and being capable of push-pull operation, wherein an end portion of the inner wire on the brake pedal side is fixed to a body fixing portion in a state pulled out from the outer wire, and an end portion of the outer wire on the brake pedal side is fixed to the brake pedal in a relatively non-rotatable manner.
According to the utility model discloses, when trampling the operation brake pedal, the brake pedal side's of external line tip removes, and the end fixing of brake pedal side is pulled out at the interior line of organism fixed part. The brake mechanism is operated by the relative movement between the inner wire and the outer wire.
The end of the outer wire is fixed to the brake pedal so as not to be relatively rotatable, and the inner wire and the outer wire do not change in relative posture in the radial direction in accordance with the stepping operation on the brake pedal. As a result, wear due to friction caused by a change in relative posture can be reduced.
Therefore, the possibility of damage to the operating wire connecting the brake pedal and the brake mechanism can be reduced.
In the present invention, it is preferable that the brake pedal has a support portion for supporting the external wire, the support portion is formed with an insertion hole through which the external wire is inserted, and an end portion of the external wire on the brake pedal side is fixed to the support portion in a state where the end portion is inserted into the insertion hole.
According to this configuration, since the outer wire is inserted into the insertion hole of the support portion and fixed, the outer wire can be easily pushed and pulled without being bent by an excessive force applied in the radial direction.
In the present invention, it is preferable that the end portion of the outer wire on the brake pedal side is fixed to the support portion by a fixing member provided in a state of sandwiching the support portion from both sides in the insertion direction.
According to this configuration, since the outer wire is fixed by the fixing members provided on both sides of the support portion in the insertion direction, the movement of the outer wire in the insertion direction is prevented. As a result, the fixing can be firmly performed in a state where the possibility of falling off is small.
In the present invention, preferably, the support portion has a substantially U-shaped cross section, both side wall portions of the support portion are fixed to the brake pedal, and the outer line is fixed to a bottom portion of the support portion between the both side wall portions.
According to this configuration, since the bottom portion, which is the portion to which the outer wire is fixed, the side wall portions on both sides thereof are fixed to the brake pedal, the portion to which the operation load is applied via the outer wire can be stably supported from both sides.
In the present invention, it is preferable that the fixed angle of the outer wire with respect to the brake pedal is set so that a relative movement amount of the inner wire with respect to the outer wire in the radial direction, which is generated in association with the stepping operation of the brake pedal, is minimized.
According to this configuration, even if the brake pedal is depressed, the amount of relative movement of the inner wire with respect to the outer wire in the radial direction is small, and therefore, the possibility of contact wear due to relative movement of the outer wire and the inner wire in the radial direction can be reduced.
In the present invention, it is preferable that the brake pedal has a front-rear direction arm portion pivotally supported by the body support portion so as to be swingable up and down about a horizontal axis, and extending forward from the body support portion, and the fixed angle is set to an inclination angle at which the front end side of the front-rear direction arm portion is located on the upper side as the front-rear direction of the front-rear direction arm portion is closer to the front-rear direction of extension.
According to this configuration, when the brake pedal is stepped on, the front-rear direction arm portion swings downward around the horizontal axis. At this time, the front-rear direction arm portion is inclined so as to be positioned lower toward the tip end side, and the fixed angle of the outer wire with respect to the brake pedal is an inclined angle so as to be positioned upper toward the tip end side of the front-rear direction arm portion, and therefore the inclination of the fixed portion of the outer wire is smaller than the swing angle of the brake pedal. As a result, even if the brake pedal is depressed greatly, excessive force is not applied to the fixing portion of the outer wire, and the occurrence of wear and the like can be reduced.
The utility model discloses in, as preferred, have the portion of reaping that reaps crops.
According to this configuration, in a farm field where crops are harvested, the vehicle body may be inclined in a stopped state, and the brake pedal may be strongly depressed. Even in the above work vehicle, damage to the operating wire due to braking operation can be easily avoided.
Drawings
Fig. 1 is a side view showing a brake operating mechanism in a non-operating state.
Fig. 2 is a side view of the brake operating mechanism showing the operating state.
Fig. 3 is an exploded perspective view of the brake operating mechanism.
Description of the reference numerals
2: transmission mechanism for traveling
3: brake mechanism
6: brake pedal
8: machine body support part
34: operating wire
34A: outer line
34B: internal thread
35: machine body fixing part
39: support part
39 a: two side wall parts
39 b: bottom part
40: plug-in hole
42: and a fixing member.
Detailed Description
Next, an embodiment of the work vehicle according to the present invention will be described with reference to the drawings. In this embodiment, a direction indicated by reference numeral "F" is a front side of the machine body, a direction indicated by reference numeral "B" is a rear side of the machine body, a direction indicated by reference numeral "U" is an upper side, and a direction indicated by reference numeral "D" is a lower side (see fig. 1 and 2).
A combine harvester, which is an example of a harvester of the work vehicle of the present invention, has a known configuration, and is not shown here, and has a harvesting unit for harvesting crops in a field in a front portion of a traveling machine body having left and right traveling devices. A crawler travel device is used as the travel device. A steering unit 1 (see fig. 1) is provided behind the harvesting unit. The rear part of the machine body is provided with a threshing device and a grain box in a transverse arrangement state. The traveling machine body has a transmission case 2 as a traveling transmission mechanism, and the transmission case 2 transmits power from the engine to the left and right traveling devices after shifting.
Next, a brake operation mechanism for performing a brake operation of the traveling machine body will be described.
As shown in fig. 1 and 2, the transmission case 2 includes a brake mechanism 3 that exerts a braking action on the left and right travel devices. The brake mechanism 3 has one operating shaft 4 for braking one of the left and right traveling devices, and the other operating shaft 5 for braking the other traveling device. The brake mechanism 3 brakes one of the traveling devices by rotating one of the operation shafts 4 in the clockwise direction in fig. 1, and brakes the other traveling device by rotating the other operation shaft 5 in the counterclockwise direction in fig. 1. During the turning travel, the left and right travel devices can be individually braked by a drive device not shown.
The driver section 1 has a brake pedal 6. When the brake pedal 6 is depressed, the operation shafts 4 and 5 of the brake mechanism 3 are both rotated, and the left and right travel devices are respectively braked. Therefore, the brake pedal 6 functions as a parking brake used when the machine body stops traveling.
As shown in fig. 3, the brake pedal 6 is supported so as to be swingable up and down about an axial center X1 of a lateral support shaft 8 provided on a lateral side wall 7A of the cab floor 7. The brake pedal 6 has: a longitudinal arm portion 9 projecting upward from the cab floor 7; and a front-rear direction arm portion 10 integrally connected to a lower end portion of the longitudinal arm portion 9 and extending in the front-rear direction. At the upper end of the longitudinal arm 9, a foot rest 11 is provided. A sleeve portion 12 fitted to the rear portion of the front and rear arm portions 10 is rotatably fitted to the support shaft 8.
A switch operation portion 13 extending downward is integrally connected to the sleeve portion 12. A detection switch 14 for detecting that the brake pedal 6 is depressed is provided at a position facing the switch operating section 13. The detection switch 14 is supported by an L-shaped bracket 15 fixed to the cab floor 7 when viewed from the side. The detection switch 14 is supported so as to be adjustable in the front-rear position with respect to the bracket 15. The detection switch 14 has a screw portion 17 inserted through an insertion hole 16 formed in the bracket 15, and a nut 18 is attached in a state of being positioned in front and rear of the bracket 15. By turning the front and rear nuts 18, the front and rear positions of the contact detection piece 14a of the adjustment detection switch 14 can be changed.
The operator's section floor 7 is provided with a position holding mechanism 19, and the position holding mechanism 19 is positioned in front of the brake pedal 6, and can hold a position in this state when the brake pedal 6 is depressed. The position holding mechanism 19 includes: a locking member 22 which is formed with a plurality of locking grooves 20 for engaging with the pedal section 11 and is supported by the lateral support shaft 21 so as to be rotatable about a lateral axis X2; pulling the spring 23 to swing and apply a force in a direction (forward) in which the locking member 22 is separated from the brake pedal 6; and an operating member 24 for manually swinging-back operation against the urging force of the pulling spring 23. When the locking member 22 is manually swung rearward in a state where the brake pedal 6 is depressed, the pedal portion 11 is engaged with the locking groove 20, and the position of the brake pedal 6 can be held.
The sleeve portion 12 is integrally connected to a rear extension portion 25 extending rearward. A pulling spring 27 is stretched between the rear extension portion 25 and the body fixing portion 26. The brake pedal 6 is biased to swing upward in the waiting posture shown in fig. 1 by the biasing force of the pull spring 27. An upper stopper member 28 is provided above a front-rear middle portion of the brake pedal 6, and the upper stopper member 28 restricts further upward swinging when the brake pedal 6 is in the waiting posture. When the driver performs a stepping operation with his foot on the pedal portion 11 against the biasing force of the pulling spring 27, the brake pedal 6 swings downward. A lower stopper member 29 is provided below the brake pedal 6, and the lower stopper member 29 restricts the brake pedal 6 from being further depressed when the brake pedal is depressed to a lower limit.
Each of the operation shafts 4 and 5 of the brake mechanism 3 has L-shaped swing operation arms 30 and 31 that are integrally rotatable. A pull spring 32 is provided for biasing the swing arm 30 of the one operation shaft 4 to rotate counterclockwise, and a pull spring 33 is provided for biasing the swing arm 31 of the other operation shaft 5 to rotate clockwise.
Further, the brake device has an operating wire 34 for connecting the swing operating arms 30 and 31 of the brake mechanism 3 and the brake pedal 6. The manipulation wire 34 has an outer wire 34A and an inner wire 34B slidably inserted into the outer wire 34A, and is capable of push-pull manipulation.
The end of the inner wire 34B on the brake pedal 6 side is fixed to the body fixing portion 35 in a state pulled out from the end of the outer wire 34A on the brake pedal 6 side. The end of the inner wire 34B on the brake mechanism 3 side is connected to the upper end of the other swing arm 31 in a state pulled out from the end of the outer wire 34A on the brake mechanism 3 side.
The end of the outer wire 34A on the brake mechanism 3 side is supported by one swing arm 30 via a holding member 36. The holding member 36 is supported at the upper end of one swing arm 30 so as to be rotatable about the horizontal axis X3. A screw portion 37 is formed at an end portion of the outer wire 34A on the brake mechanism 3 side, and the screw portion 37 is inserted and attached in a state where it is inserted through the holding member 36. Nuts 38 are attached to both insertion direction side portions of the holding member 36, and the inner wire 34B is fixed to the holding member 36 by tightening the nuts 38.
The end of the outer wire 34A on the brake pedal 6 side is fixed to the brake pedal 6 so as not to be relatively rotatable. The brake pedal 6 has a support portion 39 that supports the outer wire 34A. The support portion 39 has a substantially U-shaped cross section, and both side wall portions 39a of the support portion 39 are integrally fixed to the brake pedal 6 by welding.
The outer wire 34A is fixed to a bottom portion 39b between both side wall portions 39a of the support portion 39. An insertion hole 40 through which the outer wire 34A is inserted is formed in the bottom portion 39b, and the end portion of the outer wire 34A on the brake pedal 6 side is fixed to the support portion 39 in a state of being inserted into the insertion hole 40. A screw portion 41 is formed on the outer peripheral portion of the end portion of the outer wire 34A on the brake pedal 6 side. The screw portion 41 is inserted into the insertion hole 40 from below to above, and a nut 42 as a fixture is attached so as to sandwich the support portion 39 from both sides in the insertion direction. The end of the outer wire 34A on the brake pedal 6 side is fixed to the support portion 39 by tightening the nuts 42 on both sides.
The fixed angle of the outer wire 34A with respect to the brake pedal 6 is set so that the amount of relative movement of the inner wire 34B with respect to the outer wire 34A in the radial direction, which is caused by the depressing operation of the brake pedal 6, is minimized. Specifically, the support portion 39 is fixed to the front-rear direction arm portion 10 in a state where the bottom portion 39b is inclined upward in the extending direction of the front-rear direction arm portion 10. That is, as shown in fig. 2, when the inner wire 34B is pulled out from the outer wire 34A as the brake pedal 6 is depressed, the inner wire 34B is set so that the amount of relative movement with respect to the outer wire 34A in the radial direction is minimized.
According to the above configuration, even if the brake pedal 6 is depressed, the relative posture of the end portion of the outer wire 34A with respect to the bottom portion is less changed, and the relative movement of the outer wire 34A and the inner wire 34B in the radial direction is less, so that the wear due to the contact can be suppressed.
(other embodiments)
(1) In the above embodiment, the end portion of the outer wire 34A on the brake pedal 6 side is fixed to the support portion 39 by the nut 42 as a fixing member provided in a state of sandwiching the support portion 39, but instead of this configuration, various fixing structures such as flange fastening and fixing may be adopted.
(2) In the above embodiment, the cross section of the support portion 39 is formed in a substantially U shape, but instead of this configuration, the cross section of the support portion 39 may be formed in various shapes such as an L shape, a rectangular cylinder shape, or the like.
(3) In the above embodiment, the brake pedal 6 is supported so as to be rotatable about the support shaft 8 provided on the rear side below the cab floor 7, but instead of this configuration, for example, the brake pedal may be supported so as to be rotatable about a support shaft provided on the upper side of the cab floor 7 and located forward of the step section 11.
(availability in industry)
The utility model can be applied to various operation vehicles such as tractors and rice transplanters besides the combine harvester.
Claims (9)
1. A working vehicle is characterized in that,
comprising: a transmission mechanism for running;
a brake mechanism provided to the drive transmission mechanism;
a brake pedal for actuating the brake mechanism; and
an operating wire connecting the brake pedal and the brake mechanism,
the operation wire has an outer wire and an inner wire slidably inserted into the outer wire, and is capable of push-pull operation,
the end of the inner wire on the side of the brake pedal is fixed to a body fixing part in a state of being pulled out from the outer wire,
the end portion of the outer wire on the brake pedal side is fixed to the brake pedal in a relatively non-rotatable manner.
2. The work vehicle of claim 1,
the brake pedal is provided with a supporting part for supporting the outer wire,
an insertion hole through which the external wire is inserted is formed in the support portion,
the end portion of the outer wire on the brake pedal side is fixed to the support portion in a state of being inserted into the insertion hole.
3. The work vehicle of claim 2,
the end portion of the outer wire on the brake pedal side is fixed to the support portion by a fixing member provided so as to sandwich the support portion from both sides in the insertion direction.
4. Working vehicle according to claim 2 or 3,
the support portion is formed in a substantially U-shaped cross section,
the two side wall parts of the supporting part are fixed on the brake pedal, and the outer wire is fixed at the bottom between the two side wall parts of the supporting part.
5. The work vehicle according to any one of claims 1 to 3,
the fixed angle of the outer wire with respect to the brake pedal is set so that a relative movement amount of the inner wire with respect to the outer wire in a radial direction, which is caused by a depressing operation of the brake pedal, is minimized.
6. The work vehicle of claim 4,
the fixed angle of the outer wire with respect to the brake pedal is set so that a relative movement amount of the inner wire with respect to the outer wire in a radial direction, which is caused by a depressing operation of the brake pedal, is minimized.
7. The work vehicle of claim 5,
the brake pedal includes a front-rear direction arm portion pivotally supported by the body support portion so as to be vertically swingable about a horizontal axis and extending forward from the body support portion,
the fixed angle is set to an inclination angle that is located on an upper side as the front end side of the front-rear direction arm portion is closer to the front-rear direction of the front-rear direction arm portion with respect to the front-rear direction of extension of the front-rear direction arm portion.
8. The work vehicle of claim 6,
the brake pedal includes a front-rear direction arm portion pivotally supported by the body support portion so as to be vertically swingable about a horizontal axis and extending forward from the body support portion,
the fixed angle is set to an inclination angle that is located on an upper side as the front end side of the front-rear direction arm portion is closer to the front-rear direction of the front-rear direction arm portion with respect to the front-rear direction of extension of the front-rear direction arm portion.
9. Work vehicle according to any of claims 1, 2, 3, 6, 7, 8,
has a harvesting part for harvesting crops.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022338397.9U CN213565847U (en) | 2020-10-20 | 2020-10-20 | Working vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022338397.9U CN213565847U (en) | 2020-10-20 | 2020-10-20 | Working vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213565847U true CN213565847U (en) | 2021-06-29 |
Family
ID=76526006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022338397.9U Active CN213565847U (en) | 2020-10-20 | 2020-10-20 | Working vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213565847U (en) |
-
2020
- 2020-10-20 CN CN202022338397.9U patent/CN213565847U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |